For a BCC iron-carbon alloy that contains 0.15 wt% C, calculate the fraction of unit cells...

For a BCC iron-carbon alloy that contains 0.15 wt% C, calculate the fraction of unit cells that contain carbon

atoms.

Expert Solution

Ally Wells answered 1 year ago

For a BCC iron-carbon alloy that contains 0.23 wt% C, calculate the fraction of unit cells...

For a BCC iron-carbon alloy that contains 0.23 wt% C, calculate the fraction of unit cells that contain carbon atoms. One carbon atom per ? unit cells.

1. In carbonitriding of an iron-carbon alloy (steel) initially containing 0.05 wt% C and no nitrogen...

1. In carbonitriding of an iron-carbon alloy (steel) initially containing 0.05 wt% C and no nitrogen is subjected to carbonitriding at an elevated temperature and in an atmosphere that gives a surface carbon concentration constant at 0.5 wt% and surface nitrogen concentration constant 0.2 wt%. Find the ratio of the diffusion coefficients ‘C in steel’/‘N in steel’ if after 36 h the concentration of carbon at a position 0.4 mm below the surface is 0.35 wt%, and the concentration of...

An iron alloy with a carbon content of 0.05% C is heated up to 912oC in...

An iron alloy with a carbon content of 0.05% C is heated up to 912oC in an atmosphere that produces 1.20% C on the surface and thus is maintained for 24 hours. Calculate the carbon content at 0.05 cm below the surface if (a) iron is CC and (b) iron is CCC. Explain the difference. C-Fe bcc (Q= 20.900 cal/mol Do = 0,011 cm2/s ) C-Fefcc (Q= 32.900 cal/mol Do = 0,23 cm2/s ), ferror (0,0685)= 0,077, ferror(0,192) = 0,2139

An alloy of iron and carbon was treated with sulfuric acid, in which only the iron...

An alloy of iron and carbon was treated with sulfuric acid, in which only the iron reacts. if a sample of alloy weighing 2.358g gave home hydrogen which causes an explosion and generated 1.0368g of water, what is the percencentage of iron in the alloy? (hint: Hydrogen can react with oxygen in the air and explode)

22) the diffusion coefficient of carbon FCC iron is lower than BCC iron because a) the...

22) the diffusion coefficient of carbon FCC iron is lower than BCC iron because a) the temperature is higher for FCC b) FCC has a higher packing factor c) FCC is more cubic d) Carbon is substitional in FCC

We have a metal alloy (bcc) that Metal A is FCC, 30 atom% (40.244 wt%), r=0.2...

We have a metal alloy (bcc) that Metal A is FCC, 30 atom% (40.244 wt%), r=0.2 nm, A = 55 g/mol and, Metal B is BCC, 70 atom% (59.756 wt%), r=0.24 nm, A = 35 g/mol 1. Find the volume per atom for metal A and metal B by dividing the unit cell volume by the number of atoms in the unit cell. Put your units in cm3/atom. 2. Use the atom% values and the answers to (a) to find...

Compute diffusion coefficients for the interdiffusion of carbon in both (a) α-iron (BCC) and (b) γ-iron...

Compute diffusion coefficients for the interdiffusion of carbon in both (a) α-iron (BCC) and (b) γ-iron (FCC) at 875˚C. Assume that D0 for the interdiffusion of carbon in α-iron and in γ-iron are 1.1 × 10-6 and 2.3 × 10-5 m2/s, respectively, and that Qd are 80 and 148 kJ/mol, respectively. (a) m2/s (b) m2/s Calculate the value of D at 636°C for the diffusion of some species in a metal for which the values of D0 and Qd are...

Using an iron-carbon phase diagram, calculate the expected phases and volume fraction of each phase at...

Using an iron-carbon phase diagram, calculate the expected phases and volume fraction of each phase at room temperature for the a) the 0.20 wt.% C steel and b) the 0.45 wt.% C steel Composition (wt.% C) Furnace temp (°C) Quench media 0.20 N/A As Received(Cast) 0.20 900 Water 0.20 900 Oil 0.20 900 Air 0.45 N/A As Received 0.45 900 Water 0.45 900 Oil 0.45 900 Air

[1]- An alloy of silicon and iron (Si-Fe) has 0.25 wt% of Si. If the density...

[1]- An alloy of silicon and iron (Si-Fe) has 0.25 wt% of Si. If the density and atomic weight are 2.33 ? ??3 and 28 ? ??? for silicon and 7.87 ? ??3 and 55.85 ? ??? for iron, calculate: a) Atomic percentage of silicon and iron. b) Density of iron in the alloy ( ?? /?3 ) . c) Average atomic weight of the alloy ( ?/ ??? ) . d) Number of moles of silicon and iron.

In a system A-B-C, a ternary alloy of composition 30wt% B and 30 wt % C...

In a system A-B-C, a ternary alloy of composition 30wt% B and 30 wt % C consists at a particular temperature of three phases of equilibrium compositions as follows: Liquid phase: 50% A, 40% B, 10% C Alpha solid solution: 85% A, 10% B, 5% C Beta Solid solution:10% A, 20% B, 70% C (a) Calculate the proportions by weight of liquid, Alpha, and Beta present in this alloy. (b) For the same temperature, deduce the composition of the alloy...

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